Heat the oven to 375 degrees. Grease a 9-inch round cake pan using extra-virgin olive oil and line the bottom with parchment paper. Oil the parchment and flour the pan, shaking out any excess flour
In a large bowl, whisk together the flour, salt, baking powder and baking soda
In the bowl of an electric mixer set on high, beat the sugar, egg substitute and both zests until very thick and fluffy, about 5 minutes. With the mixer still running, slowly drizzle in the oil and beat until incorporated, another 2 minutes
Reduce speed to low, and add plant milk and lemon juice. Gradually add the flour mixture and beat until just combined
Transfer the batter to the prepared pan, smooth the top using an offset spatula and sprinkle the top with about 2 tablespoons sugar.
Bake the cake until a skewer inserted into the center comes out clean, 40 to 45 minutes.